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Sci Total Environ

Title:		Unveiling the dipole synergic effect of biogenic and anthropogenic emissions on ozone concentrations
Author(s):		Gao Y; Yan F; Ma M; Ding A; Liao H; Wang S; Wang X; Zhao B; Cai W; Su H; Yao X; Gao H;
Address:		"Key Laboratory of Marine Environment and Ecology, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ministry of Education, Ocean University of China, and Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China. Electronic address: yanggao@ouc.edu.cn. Key Laboratory of Marine Environment and Ecology, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ministry of Education, Ocean University of China, and Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China. Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. Institute for Environmental and Climate Research, Jinan University, Guangzhou 510000, China. Physical Oceanography Laboratory/CIMST, Ocean University of China and Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China; CSIRO Marine and Atmospheric Research, Aspendale, Victoria 3195, Australia. Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz D-55128, Germany; State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China"
Journal Title:		Sci Total Environ
Year:		2022
Volume:		20211120
Issue:
Page Number:		151722 -
DOI:		10.1016/j.scitotenv.2021.151722
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Biogenic emissions are widely known as important precursors of ozone, yet there is potentially a strong interaction and synergy between biogenic and anthropogenic emissions, including volatile organic compounds (VOCs) and nitrogen oxides (NOx), in modulating ozone formation. To a large extent, the synergy affects the effectiveness of anthropogenic emission control, thereby reshaping the O(3)-NOx-VOC empirical kinetic modeling approach (EKMA) diagram. Focusing on the ozone pollution period of June 2017 in the North China Plain, we design almost 500 numerical experiments using regional air quality model Community Multiscale Air Quality (CMAQ) that revealed an interesting synergic effect, defined as the contribution of biogenic emissions to ozone concentrations concomitant with a reduction in anthropogenic emissions. A quasi-EKMA diagram is constructed to delineate the contribution of biogenic emissions to ozone concentrations, indicative of a linearly amplified or nonlinearly weakened result associated with reductions in anthropogenic VOCs or NOx emissions, respectively, illustrating the dipole characteristics of the synergic effect. The reduced ozone contribution from biogenic emissions along with NOx emission reduction can be used to represent controllable biogenically induced ozone (BIO). Both the amplified and controllable BIO are tightly linked to both local emissions and regional transport, implicative of an essential role in joint regional emission control. In regard to ozone exceedance, the role of biogenic emissions may be even more important, in that its contribution is comparable to or even larger than that of anthropogenic emissions when associated with a reduction in anthropogenic emissions, which is clearly demonstrated based on the near carbon neutrality scenario shared socioeconomic pathway (SSP) 126. Meanwhile, the biogenic emissions may steer the modulation of anthropogenic emissions in the change rate of MDA8 ozone concentration. Therefore, the synergic effect of biogenic and anthropogenic emissions elucidated in this study should be carefully considered in future ozone pollution control"
Keywords:		*Air Pollutants/analysis *Air Pollution/prevention & control Environmental Monitoring *Ozone/analysis *Volatile Organic Compounds/analysis Biogenic emissions Controllable biogenically induced ozone EKMA diagram Ssp;
Notes:		"MedlineGao, Yang Yan, Feifan Ma, Mingchen Ding, Aijun Liao, Hong Wang, Shuxiao Wang, Xuemei Zhao, Bin Cai, Wenju Su, Hang Yao, Xiaohong Gao, Huiwang eng Netherlands 2021/11/24 Sci Total Environ. 2022 Apr 20; 818:151722. doi: 10.1016/j.scitotenv.2021.151722. Epub 2021 Nov 20"